Coke breaker



Sept. 30, 1947. J. DRUBKO COKE BREAKER Filed June 8, 1945 2 Sheets-Sheet1 INVENTOR.

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COKE BREAKER I Filed June '8, 1945 2 Sheets-Sheet 2 /5 INVENTOR.

' 7272 pruzl'o Patented Sept. 30, 1947 UNITED STATES" PATENT OFFICE COKEBREAKER John Drubko, J efierson, Ohio Application June 8, 1945, SerialNo. 598,321

Claims.

This present invention relates to devices associated with the fire boxesof boilers particularly locomotive boilers for preventing a boilerexplosion. The latter is quite often due to the fact that the coal inthe firebox is packed and for lack of an adequate supply of air turnsinto coke. The coke develops intense heat that weakens the back tubesheet in which the fire tubes or flues are mounted.

The main object of the invention is the construction of a mechanicaldevice preventing the formation of coke or breaking up the cokeintosmall parts.

With these and other objects in view the invention resides in thenovelty of construction, combination and arrangement of partsspecifically described in the following specification and claimed in theappended claims.

The description should be read in connection with the accompanyingdrawing in which:

Figure 1 is a back end view of the fire box of a locomotive, equippedwith the preferred embodiment of my invention;

Figure 2 is a horizontal section on line 2-2 of Figure 1;

Figure 3 is a central vertical section on line 33 of Figure 1;

Figure 4 is a transverse vertical section on line 4-4 of Figure 3.

In the drawing in which like characters of reference designate like orsimilar parts, numeral 2 denotes a boiler having fire tubes or flues 3secured at their back ends in a back tube sheet 4. In front of the backtube sheet l is the fire box 5 with rearwardly inclined grates 6.Between the front portion 1 of the grates and the lower part of the backtube sheet is a relatively narrow space for the rotary motion of an arm8 which is attached at its inner end to a shaft 9 journaled at its frontend in a bearing It! attached to the bottom side of the back end of theboiler. The back end of the shaft is journaled in a bearing ll attachedto the fire box back sheet l2 and below the higher back end of thegrates in the upper part of the ash pit l3. The shaft extends beyond thefire box back sheet and carries there a gear M which meshes with theupwardly extending teeth l5 of a rack It. The latter is slidablyarranged in guides ll fixed to the outer side of the fire box back sheetand extends to one side of the fire box. Sheet l2 has a door opening H3.The portion of the rack projecting beyond the outer side of the fire boxhas teeth l9 formed upon its back side which mesh with a gear 20 securedupon a vertical shaft 2| the lower end portion of which is journaled ina bearing 22 attached by bolts 23 to the outer side of the outside firebox sheet 24 which surrounds the fire box, the ashpit and boiler and isspaced from the inner fire box side sheet by stays 25. The top end ofthe shaft carries a hand wheel 25 which is manipulated by the firemanwhenever coal lying above the opening turns into coke which unduly heatsand thereby weakens the back tube sheet.

While I have described and illustrated my device as associated with alocomotive boiler, it may prove equally useful if connected to anyboiler.

What I claim and desire to secure by Letters Patent is:

1. In a device of the character described the combination with a boilerand its fire box including a grate, the front end of which is spacedfrom the back end of the boiler, of a coke crushing means operative inthe space defined, operating means for the first named means extendinglengthwise of and below the grate and operable outside of the fire box.

2. In a device of the character described the combination with a boilerand a fire box having a grate the front end of which is spaced from theback end of the boiler, of a cokecrushing arm rotatably arranged in thespace, a shaft secured at the front end to the inner end of the arm andextending backwardly through the ashpit and outside of the firebox, andoperating means outside of the firebox for rotating the shaft andswinging the arm.

3. In a device of the character described the combination with a boilerand firebox having a grate spaced from the adjacent end of the boiler,of a journal attached to the boiler, a shaft journaled in the journaland extending outwardly of the firebox, a coke crushing arm fixed on theshaft and swingable in the space defined, and means extraneous to thefirebox for rotating the shaft.

4. In a device of the class described the combination with a boiler andfirebox including a grate spaced from the adjacent end of the boiler,

of a bearing attached to the boiler, a shaft journaled in the bearingand extending beneath the grate and outside of the firebox, a cokecrushing arm secured to the shaft and disposed for movement in the spacebetween the grate and boiler, a bearing attached to the firebox andjournaling the shaft, and rack means for rotating the shaft and swingingthe arm.

5. In a device of the character described the combination with a boilerand firebox having a grate spaced from the boiler, a bearing attached tothe boiler, a. second bearing attached to the firebox, a shaft journaledin the bearings and extending *outside of the firebox, :a coke crushingarm secured to "the shaft and rotatable .in the space, a gear on theshaft outside of the firebox, a bar having a rack meshing with saidgear, additional rack teeth on the bar, a hand wheel shaft geared to theadditional rack teeth.

JOHN DRUBKO.

REFERENCES CITED The following references are of record file of thispatent:

UNITED STATES PATENTS in the 18,670 Great Britain Oct. 18, 1892

